title: Two doses of oral sustained-release tramadol do not reduce pain or morphine consumption after modified radical mastectomy: a randomized, double blind, placebo-controlled trial.
mesh_terms: D000284:Administration, Oral; D000293:Adolescent; D000328:Adult; D000701:Analgesics, Opioid / Q000008:administration & dosage*; D001943:Breast Neoplasms / Q000601:surgery; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D015411:Mastectomy, Modified Radical / Q000009:adverse effects*; D008875:Middle Aged; D009020:Morphine / Q000008:administration & dosage*; D010149:Postoperative Pain / Q000188:drug therapy*; D014147:Tramadol / Q000008:administration & dosage*; D016896:Treatment Outcome
chemical_list: D000701:Analgesics, Opioid; D014147:Tramadol; D009020:Morphine